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erratic idle at startup

usdmej
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usdmej Member

usdmej

Posted
Posted

whats up fellows, up until now my 996 has been nothing but reliable. but recently when i start it up in the morning the idle will go up and down until the engine warms up. after that all is fine. is this something that should be expected? ive got no cels or anything like that

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Loren Member

Loren

Posted
  • Admin
Posted
how did u know it was a 99?!? =O
I looked at your profile.

A MY99 C2 is not egas so you have an idle control valve.

Chances are this needs cleaning or the solenoid is bad and it needs replacing.

Either way you should remove it clean it (and the throttle body while you are there).

This process has been documented here many times so please do a search if you need details

usdmej Member

usdmej

Posted
  • Author
Posted
how did u know it was a 99?!? =O
I looked at your profile.

A MY99 C2 is not egas so you have an idle control valve.

Chances are this needs cleaning or the solenoid is bad and it needs replacing.

Either way you should remove it clean it (and the throttle body while you are there).

This process has been documented here many times so please do a search if you need details

thanks for the tips loren, i found how-tos of the throttle body cleaning but i cant seem to locate insturctions on how to get to the idle control valve. can anyone help me out?

jamesgood72 Member

jamesgood72

Posted
Posted

I was wondering about that too. I assume you have to take the throttle body off (the four bolts), to get to it. I tried removing the idle control valve 'in position' but couldn't get a good angle on the rear torx screw so aborted since I didn't want to destroy the screw. I think my idle control valve is faulty too.

-James.

thanks for the tips loren, i found how-tos of the throttle body cleaning but i cant seem to locate insturctions on how to get to the idle control valve. can anyone help me out?
  • Admin
Loren Member

Loren

Posted
  • Admin
Posted
how did u know it was a 99?!? =O
I looked at your profile.

A MY99 C2 is not egas so you have an idle control valve.

Chances are this needs cleaning or the solenoid is bad and it needs replacing.

Either way you should remove it clean it (and the throttle body while you are there).

This process has been documented here many times so please do a search if you need details

thanks for the tips loren, i found how-tos of the throttle body cleaning but i cant seem to locate insturctions on how to get to the idle control valve. can anyone help me out?

There are just two Torx (or allen) screws and an electrical connection on the idle control valve. Be careful of the paper gasket when you take it off - so you can reuse it.

usdmej Member

usdmej

Posted
  • Author
Posted
Cleaning the IAC valve is very very very easy. Definite DIY and helped my (now deceased) engine's idle immensely.

i'm hoping this wil fix my engine woes, can anyone show me a picture of the IAC valve so i can know what i'm looking for?

  • Admin
Loren Member

Loren

Posted
  • Admin
Posted
Cleaning the IAC valve is very very very easy. Definite DIY and helped my (now deceased) engine's idle immensely.

i'm hoping this wil fix my engine woes, can anyone show me a picture of the IAC valve so i can know what i'm looking for?

Have you tried our Search?

I searched for ICV and got over 40 results - some with pics, including the following thread.

Idle Air Control Valve - how is it supposed to look?

jacaba Member

jacaba

Posted
Posted

Purchase CRC Throttle Body and Air Intake Cleaner and go to the DIY section and see how its done. I did this to mine . . . cleaned out the sludge, etc. This is a great place to be for all DIY's.

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